Ice筆記—非同步程式設計demo

最近學習了非同步通訊這一章：非同步包括服務端的非同步指派（AMD）以及用戶端的非同步呼叫（AMI）。

下面介紹一下如何?簡單的非同步通訊（主要實現了用戶端的非同步呼叫，AMD暫未體現）：

 

 1.首先編寫Ice檔案:Demo.ice

module Demo{interface Employee{      ["amd"]void add(int a, int b, out int sum);};};

     ["amd"]表示的是中繼資料，指定伺服器端將提供非同步指派的方法函數。該add函數中有兩個in參數；一個out參數，作為回傳參數。

 

2.映射到C++代碼：使用命令 slice2cpp Demo.ice

   經過映射之後，程式將產生Demo.h與Demo.cpp檔案，如下面部分代碼所示Demo.h

// ....More code beforenamespace Demo{class Employee : virtual public ::Ice::Object{public:    typedef EmployeePrx ProxyType;    typedef EmployeePtr PointerType;        virtual ::Ice::ObjectPtr ice_clone() const;    virtual bool ice_isA(const ::std::string&, const ::Ice::Current& = ::Ice::Current()) const;    virtual ::std::vector< ::std::string> ice_ids(const ::Ice::Current& = ::Ice::Current()) const;    virtual const ::std::string& ice_id(const ::Ice::Current& = ::Ice::Current()) const;    static const ::std::string& ice_staticId();    virtual void add_async(const ::Demo::AMD_Employee_addPtr&, ::Ice::Int, ::Ice::Int, const ::Ice::Current& = ::Ice::Current()) = 0;    // ... More code here    };// ...

 

3. 實現服務端程式

    建立Server.cpp檔案，將Demo.h中的虛方法add_async()實現。並建立servant類來繼承Ice::application類,初始化Ice run time ,同時將servant註冊到對象適配器中去。

   

#include <Demo.h>#include <Ice/Application.h>#include <IceUtil/Monitor.h>#include <iostream>using namespace std;using namespace Demo;class Manager : virtual public Employee,public IceUtil::Monitor<IceUtil::Mutex>{public:Manager():_sum(0){}~Manager(){}virtual void add_async(const ::Demo::AMD_Employee_addPtr& add_ptr, int a, int b, const ::Ice::Current& =::Ice::Current()){_sum = a+b;sleep(1);cout<< "The sum is " <<_sum<<"."<<endl;add_ptr->ice_response(_sum);   //資料處理完之後，回呼函數，調用用戶端實現的方法}private:int _sum;};class myApplication : virtual public Ice::Application {public:virtual int run(int argc , char* argv[]){    Ice::ObjectAdapterPtr adapter =                  communicator()->createObjectAdapterWithEndpoints("GameServer", "default -p 10000");Ice::ObjectPtr Manptr = new Manager;adapter->add(Manptr, communicator()->stringToIdentity("ManServer"));//將servant類對象指標ManPtr註冊到適配器中adapter->activate();  //啟用適配器，使用戶端能夠訪問適配器中已添加的servant活動表communicator()->waitForShutdown();}};int main(int argc , char * argv[]){myApplication app;app.main(argc , argv);return 0;}

4.實現用戶端程式

   建立Client.cpp檔案，實現回呼函數，建立訪問指定servant的代理。

#include<Ice/Ice.h>#include<Demo.h>#include<iostream>#include<IceUtil/IceUtil.h>using namespace std;using namespace Demo;class Client_add:public AMD_Employee_add{public: virtual void ice_response(int sum) {   cout << "receive from server--The sum is "<<sum<<"."<<endl; } virtual void ice_exception(){} virtual void ice_exception(const std::exception& e){} void failed_operation(const Ice::Exception &e){}};typedef IceUtil::Handle<Client_add> ClientAddPtr;class ClientApp : virtual public Ice::Application{public: virtual int run(int argc , char* argv[]) {  Ice::ObjectPrx base = communicator()->stringToProxy("ManServer:default -p 10000");  EmployeePrx emp = EmployeePrx::checkedCast(base);  if(!emp)throw "Invalid Proxy!";  ClientAddPtr amd_add = new Client_add;                 Callback_Employee_addPtr addPtr=newCallback_Employee_add(amd_add,&Client_add::ice_response,&Client_add::failed_operation);     //實現回調對象指標                emp->begin_add(10,20,addPtr);   //第三個參數為回調類的智能指標   cout<<"I'm waiting for the data from,but not blocked."<<endl; }};int main(int argc , char* argv[]){ ClientApp app; app.main(argc , argv); return 0;}

 

5. 編譯Server.cpp: g++ Demo.cpp Server.cpp -o Server -lIce -lIceUtil -I./ -I/opt/Ice-3.4.2/include -L/opt/Ice-3.4.2/lib

     編譯Client.cpp: g++ Demo.cpp Client.cpp -o Client -lIce -lIceUtil -I./ -I/opt/Ice-3.4.2/include -L/opt/Ice-3.4.2/lib

    運行服務端:./Server 運行用戶端：./Client